I'd say it's two-sided. I assume it would help a bit with your general condifidence level, as a person who stutters allowing yourself to speak a lot can never go wrong. However, relying excessively on AI cannot be a reasonable path, as I see it. I'd never feel encouraged by a computer programme, especially when it comes to stammering. If I were you, I'd rather be speaking with real people, especially with those who stutter as well. I've just come back from a Youth Exchange programme organized for people who stutter, and it was a life-changing experience. If there's a stuttering association in your own country, try to contact them, the rest will come. The same was for me. Stay strong : )